Plastering is essential for smooth, durable walls, but it doesn’t always go as planned. Cracks, damp patches, and uneven finishes can make a project frustrating. Understanding the causes and solutions can save time and money while ensuring a high-quality finish. Here’s a look at the most common plastering problems and how to fix them—while also understanding how long plaster takes to dry to prevent many of these issues from occurring in the first place.
Common plastering problems: cracks in plaster
Cracks are one of the most common issues homeowners face. They often occur due to building movement, improper application, or the plaster drying too quickly. Hairline cracks might not seem like a big problem, but they can worsen over time if left untreated.
To fix small cracks, apply a fine filler, sand it smooth, and repaint. For deeper cracks, widen them slightly before applying a bonding agent and refilling with fresh plaster. If cracks keep reappearing, it could be due to structural movement. In this case, consulting a professional plasterer is the best option. Letting dry plaster cure fully before decorating can also help prevent future cracking.
Blistering and bubbling plaster
Bubbles or blisters form when plaster doesn’t adhere properly to the surface, often due to trapped moisture or poor bonding. This problem usually appears soon after plastering, making it easier to spot before painting.
The best way to fix bubbling plaster is to remove the affected area, allow the wall to dry completely, and then apply a primer before reapplying fresh plaster. Good airflow is key—especially when considering how long for plaster to dry before painting. Ensuring proper ventilation in the room can help moisture escape and prevent future bubbling.
Damp or moldy patches
Damp plaster can be a serious issue, especially in older homes. It usually appears as dark, cold patches on the walls, sometimes with a musty smell. This happens when moisture gets trapped due to leaks, rising damp, or poor ventilation.
Fixing damp plaster starts with identifying and eliminating the source of moisture. Leaking pipes, poor drainage, or condensation are common causes. Once the issue is addressed, the plaster may need to be removed, and the wall treated before applying fresh material. Lime plaster drying time is longer than modern gypsum plaster, but its breathability makes it ideal for preventing damp and mold issues in period properties.
Uneven or rough plaster finish
Sometimes, plaster doesn’t set smoothly, leaving an uneven or lumpy surface. This usually happens due to improper mixing, poor application, or a lack of troweling at the right stages.
To fix minor imperfections, sanding the surface before painting can help. However, for severely rough finishes, a thin skim coat of plaster is needed to create a smooth surface. Understanding how long does multi finish plaster take to dry—typically 1 to 2 weeks depending on thickness and humidity—can help ensure proper timing between coats and avoid rough textures.
Plaster not sticking to the wall
If plaster starts peeling or falling off, it’s usually due to poor surface preparation. Dust, grease, or flaky paint can prevent plaster from bonding correctly. In some cases, the surface may be too smooth, requiring a bonding agent for better adhesion.
Before plastering, always clean the wall thoroughly. If the surface is too smooth, applying a bonding agent or a base coat helps the plaster stick properly. Also, consider how long does bonding plaster take to dry—generally 24 to 48 hours—before applying finishing layers.
Plaster drying too quickly
When plaster dries too fast, it can crack or fail to bond correctly. This often happens in warm weather or when the mix has too little water.
To slow down drying, lightly mist the wall with water before applying plaster. Avoid working in direct sunlight or extreme heat. Using a slower-setting plaster mix can also help achieve a smoother finish. It’s important to remember that how long does plaster take to dry depends on the environment and material used. Rushing the process can lead to costly repairs.
Why drying time matters
Many plastering problems arise from not allowing enough time for drying. Whether you’re working with lime, bonding, or multi finish plaster, knowing how long for plaster to dry is essential to avoid future issues. Generally, you should allow:
-
Multi finish plaster: 5–7 days
-
Bonding plaster: 24–48 hours
-
Lime plaster: 2–4 weeks depending on conditions
Before painting, always check how long does plastering take to dry fully, as painting too early can seal in moisture and cause bubbling or mold later on.
Get professional plastering services in Cheltenham and forget about the common plastering problems!
Fixing common plastering problems can be tricky. If you need expert repairs or fresh plastering, trust the professionals.
Heritage Plastering specializes in both lime plastering and modern plastering for homes in Cheltenham, Gloucestershire, and the Cotswolds. Whether you’re wondering how long does plastering take, or need advice on how long does it take plaster to dry, we provide expert guidance tailored to your property and plaster type. Contact us today for professional support and a free quote!